Replaceable implement part



March 10, 1959 D. F. cHRl's-roFl-ERSON 2,876,853*

' REPLACEABLI: 'IMPLEMENT PART Filed Aug; 12, 1957 I g/ 14 j? j? REPLACEABLE IMPLEMENT PART Donald F. Christoiferson, Stockton, Calif., assignor to International Harvester Company, Chicago, Ill., a corporation of New Jersey Application August 12, 1957, Serial No. 677,522 9 Claims. (Cl. 172-753) Other objects and advantages of the invention will` become clear from the following detailed description when read in conjunction with the accompanying drawings, wherein:

Figure 1 is a view in side elevation, partly in section,

of a subsoiler incorporating the features of this invention;

Figure 2 is a section, with parts removed, taken on the line 2-2 of Figure 1;

Figure 3 is a section taken on the line 3-3 of Figure 1;

Figure 4 is a section taken on the line 4-4 of Figure 1; and

Figure 5 is a View similar to Figure 1 with the parts disassembled.

In the drawings the numeral designates a vertical shank or standard, the lower end of which is bent forwardly to form a tapered or wedge-shaped foot section 11.

A cultivator shovel or earth-penetrating tooth 12 comprises a shoe 13 having a toe 14 at its forward end and a rearwardly directed tapered socket 1S shaped to conform generally to the shape of foot 11 of standard 10.

Shoe 13 comprises a lower wall 16, side walls 17, and an upper wall 18 having an opening 19 at the forward end adjacent toe 14. Opening 19 communicates with an opening 20 in lower wall 16 and with the tapered socket 15.

Opening 19 is adapted to receive the rearward extension 21 of an earth-penetrating point 22 arranged to overlap toe 14 and having a groove 23 in its lower surface adapted to receive the toe 14.

Extension 21 underlaps the upper wall 18 and is offset below the forward portion of earth-penetrating point 22 to form a shoulder 24 engageable with the edge 25 of upper wall 18 defining the rear boundary of opening 19.

Figure 5 shows the manner of inserting point 22 of the earth-penetrating tooth in opening 19 of the shoe 13 and also the partial reception of foot 11 of the shank or standard 10 in socket 15. Figure 1 shows the parts assembled with toe 14 received in groove 23 of the point and with the forward edge of foot 11 engaging the lower edge of the rear end of extension 21, the upper edge of which engages the lower surface of upper wall 18 of the shoe. Point 22 is thus locked in place by the wedging action of foot 11.

Figure 5 shows an opening 26 in the foot 11 and a.

A'United States Patent ice vertical slot 27 in the side walls of shoe 13. Figure l shows these apertures to be in registry when the parts are properly assembled and adapted to receive a pin 28 held in place by washers 29 and cotter keys 30. ,f

Also forming a part of the earth-working tool of this invention is a separable shin 31, the lower end of which is curved forwardly and is receivable in the space between the upper edge of foot 11 and the inner surface of upper wall 18 of the shoe where it is securely held. The upper end of the shin 31 may, if desired, be further secured to the standard 10 by one or more clips 32.

Most of the wear upon an implement of the type shown and described is taken upon the point 22 although the shin 31 is also subject to considerable wear. It is readily observed that the point 22 is easily replaceable and is held in place without the use of bolts and pins. It is replaced by removing pin 28, sliding shoe 13 forwardly and withdrawing the point 22 for sharpening or replacement. Due to the tremendous size and weight of an implement of this type, the economic advantages of a replaceable wear point are obvious as well as the saving in time and labor involved in replacing a point.

The construction and operation of the invention should be clearly understood from the foregoing description. It should likewise be understood that the invention has been described in its preferred embodiment and that modifications may be made therein without departing from the spirit of the invention or the scope of the appended claims.

What is claimed is:

1. In an implement, a generally vertical supporting standard having a forwardly directed foot portion, an earth-penetrating tooth having a rearwardly opening socket shaped to conform generally to the shape of but larger than said foot to provide a space therebetween and a wall of the socket, said tooth having an opening adjacent the forward end thereof communicating with the interior of said socket, and a separable point having a forward earth-penetrating portion and a rearward extension slidably receivable in said opening and adapted to be inserted in the space between said foot portion and the wall of the socket to hold the point therein.

2. The invention set forth in claim 1, wherein the portion 0f the foot engaging the rearward extension of said point is wedge-shaped.

3. In an implement, a generally vertical supporting standard having a wedge-shaped attaching portion, an earth-penetrating tooth having a rearwardly opening socket shaped to conform generally to the shape of but larger than said attaching portion to provide a space therebetween and the top of the socket, said tooth having an opening in the upper surface thereof communicating with the interior of said socket, and a separable point having ya forward earth-penetrating portion and a rearward extension the upper surface of which is offset below the upper surface of the earth penetrating portion, said rearward extension being adapted to be received in the space -between the attaching portion of said standard and the top of the socket to lock the point therein.

4. In an implement, a generally vertical supporting standard having a wedge-shaped attaching portion, an earth-penetrating tooth having a rearwardly opening socket shaped to conform generally to the shape of but larger than said attaching portion to provide a space therebetween and the top of the socket, said tooth having an opening in the upper surface thereof communicating with the interior of said socket, a separable point having a forward earth-penetrating portion and a rearward extension the upper surface of which is offset below the upper surface of the earth penetrating portion, said rearward extension being adapted to `be received in the space between the attaching portion of said standard and the top of the socket to lock the point therein, said tooth and said standard having apertures adapted to register when the rearward extension of said point is locked in said opening in the tooth, and means insertable in saidy openings for securing the tooth to the standard.

5. In an implement, a generally vertical supporting standard having a forwardly bent Wedge-shapedfoot portion, an earth-penetrating tooth having a rearwardly opening socket shaped to conform generally to the shape of but larger than said foot to provide a space therebetween and the top of the socket, and a separable shin adapted to be secured to the forward earth-penetrating edge of said standard, said shin having itsk lower portion shaped to conform to the curvature of the lower portion of the standard and having its forward portion receivable in said rearwardly opening socket in the space between Said foot andthe top of the socket to be frictionally held therein, said tooth having an opening in the upper surface thereof communicating with the interior of said socket, and a separable point having a forward earth-penetrating portion and a rearward extension slidably receivable in said opening and adapted to be received in said space between said foot and the top of the socket forwardly of the lforward end of said shin and to be frictionally held therein with said shin.

6, In an implement, a generally vertical supporting standard having a forwardly directed wedge-shaped` foot, ashoe having a rearwardly opening tapered socket conforming. generally to the shape of said foot but providing av space between the latter and the top of the socket and a toe at its forward end, said shoe having an opening therein rearwardly of said toe communicating with said socket, and an earth penetrating pointhaving a, rear portion insertable in saidopening and into said space with the upper edge thereof engageable with the inner surface of the upper wall of saidsocket andy the lower edge thereof engageable with the upper surface of said foot.

7. In an implement, a generally vertical supporting standard having a forwardly directed wedge-shaped foot, a shoe having a rearwardly opening tapered socket conforming to the shape of said foot but providing a space between the latter and the top of the socket and a toe at its forward end, said shoe having an opening therein rearwardly of said toe communicating with said socket, and an earth-penetrating point having a rear portion insertable in said opening and into said space and underlapping the upper wall of said socket, and a forward portion overlapping said. toe, said rear portion of the point being adapted to be wedged between said foot and the upper wall of said socket.

8. The invention set forth in claim 7, wherein said rear portion of said point is offset to provide a shoulder on the forward portion thereof arranged to abut the upper wall of the socket defining the rear edge of said opening, and wherein the lowerv edge of the forward portion of said point is notched to receive said toe.

9. The invention set forth in claim 7, wherein apertures are provided in said foot and said shoe and are adapted to register when the rear portion of saidV point is wedged in the socket -by the foot of said standard, and locking means is receivable in said apertures to hold the shoe to thestandard.

References Cited in the le of this patentv UNITED STATES PATENTS 788,137 Huxford Apr. 25,1905 985,591 Hicks Feb. 28, 19-11 299,676 Campbell Apr. 8, 1919 2,036,111 Wilson Mar. 31, 1936 2,129,453 Van Sickle Sept. 6, 1938 2,783,701 Padrick Mar. 5, 1957 

